EP2911840B1 - Mould for stamping and overmoulding a composite material insert and associated method for producing an overmoulded component - Google Patents

Mould for stamping and overmoulding a composite material insert and associated method for producing an overmoulded component Download PDF

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Publication number
EP2911840B1
EP2911840B1 EP13780348.2A EP13780348A EP2911840B1 EP 2911840 B1 EP2911840 B1 EP 2911840B1 EP 13780348 A EP13780348 A EP 13780348A EP 2911840 B1 EP2911840 B1 EP 2911840B1
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EP
European Patent Office
Prior art keywords
mold
composite material
overmolding
blade
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13780348.2A
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German (de)
French (fr)
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EP2911840A1 (en
Inventor
Issmail MESKIN
Sébastien VELASCO
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Valeo Systemes Thermiques SAS
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Valeo Systemes Thermiques SAS
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Publication of EP2911840A1 publication Critical patent/EP2911840A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/27—Means for performing other operations combined with cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
    • B26F2210/06—Trimming plastic mouldings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/32—Moulds having cutting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2715/00—Condition, form or state of preformed parts, e.g. inserts

Definitions

  • the present invention relates to a mold for overmoulding inserts of composite material, and more particularly to a mold for overmolding and stamping.
  • the invention also relates to a method for manufacturing an overmolded part using the mold mentioned above.
  • a known solution to meet its constraints imposed by the specifications of the various manufacturers is to offer molded composite parts. These parts are generally made from a sheet of composite material which is initially shaped, for example by stamping in a first mold, to form an insert of composite material. In a second step, the inserts of composite material are machined, for example by means of specific machine tools and then placed in overmoulding molds.
  • the document DE 23 53 460 A1 discloses a mold for stamping and insert overmolding.
  • This manufacturing process thus requires the use of various molds and machine tools which lengthen the manufacturing time and which have a cost on the cost price of the piece of final molded composite material.
  • One of the aims of the invention is therefore to at least partially meet the disadvantages of the prior art and to provide an improved and economical mold and manufacturing method.
  • the mold thus allows the stamping of the composite material insert, the cutting of the latter according to a desired machining due to the blade and overmoulding of the composite material insert due to the joined nature of the contacts between the various elements. . These three operations can be made from the same mold so as to form an economic final molded part.
  • the second half-mold comprises a cutting plate.
  • the cutting plate is made of high hardness steel.
  • the blade is an attached and removable element fixed on the support.
  • the support comprises an evacuation channel and that the pusher comprises at least one protrusion so as to push the cutting drop of the composite material insert inside said evacuation channel.
  • the orifices, the support, the pusher and the blade have a circular shape.
  • the support comprises an evacuation channel and the pusher comprises at least one protrusion so as to pushing the cutting chute of the composite material insert into said discharge channel.
  • said method comprises an additional step of spacing. two half-molds to enlarge the receiving space and overmoulding to accommodate a predetermined volume of overmoulding material.
  • FIGS. 1 to 5 show perspective representations in section of a mold 1 according to the invention, during different times of the manufacturing process 100.
  • the mold 1 for embossing and overmolding the insert of composite material 3 comprises a first and a second half-molds 1a, 1b complementary to each other and defining a receiving space and overmolding 5 of the insert of composite material 3.
  • the shape of the first and second half-molds 1a, 1b allows the shaping of said insert of composite material 3 by stamping.
  • the mold 1 also comprises an injection orifice 7 of over-molding material 9 through which the overmolding material 9, for example a thermoplastic, is injected into the receiving and overmolding space 5.
  • the first half-mold 1a comprises at least one orifice 20 inside which is placed a blade 24 punched carried by the end of a support 22 movable so as to be able to cut the insert of composite material 3 by movement of the support 22 towards the receiving and overmolding space 5.
  • the blade 24 is contiguous with the wall of the orifice 20 of the first half-mold 1a.
  • the blade 24 can come from material with the support 22 or, as shown on the Figures 1 to 5 , being an attached and dismountable element fixed on the support 22, for example by means of screws 25.
  • the second half-mold 1b comprises an orifice 30, facing the at least one orifice 20 of the first half-mold 1a, inside which is placed a pusher 32 of corresponding shape and joined to the wall of the orifice 30 of the second half-mold 1b.
  • the pusher is movable inside the orifice 30 of the second half-mold 1b so as to be able to come into contiguous contact with the blade 24.
  • the orifice 30 of the second half-mold 1b is smaller than the orifice 20 of the first half-mold 1a, so that the end of the pusher 32 can come into contact with the blade 24 as shown on the Figures 3 and 4 .
  • the second half-mold 1b may also include a cutting plate 34, facing the blade 24 so as to facilitate the cutting of the composite material insert 3 as well as to protect the second half-mold 1b of said blade.
  • the cutting plate 34 may be of high hardness steel and be fixed to the second half-mold 1b by means of screws 35.
  • the support 22 may comprise a discharge channel 27 at its center to accommodate and allow the evacuation of the cutting chute 3 'of the composite material insert 3.
  • the pusher 32 of the second half-mold 1b may in turn have at least one protrusion 36 so as to push the cutting chute 3 'into the discharge channel 27 of the pusher 22.
  • reception and overmolding space 5 can thus accommodate an injection molding material 9 via the injection port 7 which will fill it and overmold the composite material insert 3.
  • orifices 20, 30 By varying the number of orifices 20, 30 it is thus possible to directly machine the insert of composite material 3 inside the mold 1.
  • the shape of the cut made by the blade 34 in punch, as well as the shape of the pusher 32, the support 22 and the orifices 20, 30 may for example be circular in order to form a tubular orifice for the passage of an axis or a fixing screw in the overmoulded part 3, 9 after overmolding .
  • the mold 1 allows the stamping of the composite material insert 3 to cut the latter according to a desired machining and the overmoulding of the composite material insert 3 so as to form an overmoulded part 3, 9 economic final because requiring less operations and machine tools for its manufacture.
  • the present invention also relates to a method of manufacturing 100 an overmoulded part 3, 9 comprising an insert made of composite material 3, with medium of a mold 1 as previously described.
  • the Figures 6 and 7 show a flowchart of the different steps of such a manufacturing method 100 according to two embodiments.
  • the manufacturing method thus comprises a step 102 of placing a composite material 3 in the mold 1, for example in the form of a sheet, and more precisely between the two half-molds 1a, 1b. This step is illustrated in particular by the figure 1 .
  • a step 104 is made to close the mold 1 and stamping by bringing the two half-molds 1a, 1b closer together.
  • step 106 of pushing the support 22 into the at least one orifice 20 of the first half-mold 1a towards the receiving and overmolding space 5.
  • This step 106 is intended to cut the composite material insert 3 to means of the blade 24 within the receiving and overmolding space 5.
  • Steps 104 and 106 are particularly illustrated by the figure 2 .
  • Step 106 is followed by a step 108 of pushing the pusher 32 so that it comes into sealing contact with the blade 24 and pushes the blade 24 and the support 22 so as to close the receiving space in a sealed manner. and overmoulding 5.
  • This step 106 is particularly illustrated by the figure 3 .
  • this step 108 also allows the evacuation of the cutting chute 3 '. The latter is repelled by the at least one protrusion 36 in the evacuation channel 27.
  • a step 110 for injecting the overmolding material 9 into the receiving and overmolding space 5 is carried out by means of the injection orifice 7. This step 110 is particularly illustrated by the figure 4 .
  • said method may comprise an additional step 114 of spacing the two half-molds. 1a, 1b to enlarge the receiving and overmolding space 5 to accommodate a predetermined volume of overmoulding material 9.
  • the figure 6 shows a first embodiment where the additional step 114 is performed following the step 106 of pushing the support 22 to the receiving and overmolding space 5.
  • the figure 7 shows a second embodiment where the additional step 114 is performed following the push step 108 of the pusher 32.
  • a step 112 is made for opening the mold 1 by separating the two half-molds 1a, 1b and evacuating the overmoulded part 3, 9. This step 112 is particularly illustrated by the figure 5 .
  • the mold 1 allows three operations that are the stamping of the composite material insert 3, the cutting of the latter according to a desired machining and overmoulding of the insert of composite material 3. This allows to obtain after the manufacturing process 100 an overmoulded part 3, 9 economic because requiring less operations and machine tools for its manufacture.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

La présente invention concerne un moule pour surmoulage d'inserts en matériau composite, et plus particulièrement un moule pour surmoulage et estampage. L'invention concerne également un procédé de fabrication d'une pièce surmoulée utilisant le moule précédemment cité.The present invention relates to a mold for overmoulding inserts of composite material, and more particularly to a mold for overmolding and stamping. The invention also relates to a method for manufacturing an overmolded part using the mold mentioned above.

De plus en plus, notamment dans le domaine de la construction automobile, une attention particulière est apportée à la réduction de masse des différentes pièces tout en garantissant des performances mécaniques équivalentes voir supérieures.More and more, especially in the field of automotive construction, special attention is given to the mass reduction of the various parts while ensuring equivalent or better mechanical performance.

Une solution connue pour répondre à ses contraintes imposées par les cahiers des charges des différents constructeurs est de proposer des pièces en matériau composite surmoulées. Ces pièces sont généralement fabriquées à partir d'un feuillet en matériau composite qui est dans un premier temps mis en forme, par exemple par estampage dans un premier moule, pour former un insert en matériau composite. Dans un second temps, les inserts en matériau composite sont usinés, par exemple au moyen de machines outils spécifiques pour ensuite être placés dans des moules pour surmoulage. Par exemple, le document DE 23 53 460 A1 décrit un moule pour estampage et surmoulage d'insert.A known solution to meet its constraints imposed by the specifications of the various manufacturers is to offer molded composite parts. These parts are generally made from a sheet of composite material which is initially shaped, for example by stamping in a first mold, to form an insert of composite material. In a second step, the inserts of composite material are machined, for example by means of specific machine tools and then placed in overmoulding molds. For example, the document DE 23 53 460 A1 discloses a mold for stamping and insert overmolding.

Ce procédé de fabrication nécessite ainsi l'utilisation de différents moules et machines outils qui allongent le temps de fabrication et qui ont un coût sur le prix de revient de la pièce en matériau composite surmoulée finale.This manufacturing process thus requires the use of various molds and machine tools which lengthen the manufacturing time and which have a cost on the cost price of the piece of final molded composite material.

Un des buts de l'invention est donc de répondre au moins partiellement aux inconvénients de l'art antérieur et de proposer un moule ainsi qu'un procédé de fabrication améliorés et économiques.One of the aims of the invention is therefore to at least partially meet the disadvantages of the prior art and to provide an improved and economical mold and manufacturing method.

La présente invention concerne donc un moule pour estampage et surmoulage d'insert en matériau composite, ledit moule comprenant un premier et un second demi-moules complémentaires l'un de l'autre et définissant un espace de réception et de surmoulage de l'insert en matériau composite, ainsi qu'au moins un orifice d'injection de matériau de surmoulage:

  • le premier demi-moule comportant au moins un orifice à l'intérieur duquel est placée une lame en emporte-pièce portée par l'extrémité d'un support mobile, de sorte à pouvoir découper l'insert en matériau composite, ladite lame étant également jointive avec la paroi de l'orifice du premier demi-moule,
  • le second demi-moule comporte un orifice, en regard du au moins un orifice du premier demi-moule, à l'intérieur duquel est placé un poussoir de forme correspondante et jointif avec la paroi de l'orifice du second demi-moule et mobile de sorte à pouvoir venir en contact jointif avec la lame.
The present invention thus relates to a mold for stamping and overmoulding of insert of composite material, said mold comprising a first and a second half-molds complementary to one another and defining a space for receiving and overmolding the insert composite material, as well as at least one overmoulding material injection orifice:
  • the first half-mold having at least one orifice inside which is placed a punched blade carried by the end of a movable support, so as to be able to cut the composite material insert, said blade being also joined with the wall of the orifice of the first half-mold,
  • the second half-mold comprises an orifice, facing the at least one orifice of the first half-mold, inside which is placed a pusher of corresponding shape and joined with the wall of the orifice of the second half-mold and movable so that it can come into contact with the blade.

Le moule permet ainsi, l'estampage de l'insert en matériau composite, la découpe de ce dernier selon un usinage désiré grâce à la lame et le surmoulage de l'insert en matériau composite de part le caractère jointif des contacts entre les différents éléments. Ces trois opérations peuvent être ainsi réalisées à partir d'un même moule de sorte à former une pièce surmoulée finale économique.The mold thus allows the stamping of the composite material insert, the cutting of the latter according to a desired machining due to the blade and overmoulding of the composite material insert due to the joined nature of the contacts between the various elements. . These three operations can be made from the same mold so as to form an economic final molded part.

Selon un aspect de l'invention, en regard de la lame, le second demi-moule comporte une plaque de découpe.According to one aspect of the invention, opposite the blade, the second half-mold comprises a cutting plate.

Selon un autre aspect de l'invention, la plaque de découpe est en acier à haute dureté.According to another aspect of the invention, the cutting plate is made of high hardness steel.

Selon un autre aspect de l'invention, la lame est un élément rapporté et démontable fixé sur le support.According to another aspect of the invention, the blade is an attached and removable element fixed on the support.

Selon un autre aspect de l'invention, le support comporte un canal d'évacuation et que le poussoir comporte au moins une excroissance de sorte à pousser la chute de découpe de l'insert en matériau composite à l'intérieur dudit canal d'évacuation.According to another aspect of the invention, the support comprises an evacuation channel and that the pusher comprises at least one protrusion so as to push the cutting drop of the composite material insert inside said evacuation channel. .

Selon un autre aspect de l'invention, les orifices, le support, le poussoir et la lame ont une forme circulaire.According to another aspect of the invention, the orifices, the support, the pusher and the blade have a circular shape.

La présente invention concerne également un procédé de fabrication d'une pièce surmoulée, comportant un insert en matériau composite, au moyen d'un moule selon l'un des aspects précédents et comportant les étapes suivantes :

  • une étape de mise en place d'un matériau composite entre le premier et le second demi-moule,
  • une étape de fermeture du moule et d'estampage par rapprochement des deux demi-moules,
  • une étape de poussée du support de l'au moins un orifice vers l'espace de réception et de surmoulage de sorte à découper l'insert en matériau composite au moyen de la lame,
  • une étape de poussée du poussoir de sorte qu'il entre en contact étanche avec la lame et repousse ladite lame et le support de sorte à refermer de façon étanche l'espace de réception et de surmoulage,
  • une étape d'injection du matériau de surmoulage, et
  • une étape d'ouverture du moule par séparation des deux demi-moules et d'évacuation de la pièce surmoulée.
The present invention also relates to a method of manufacturing an overmoulded part, comprising an insert made of composite material, by means of a mold according to one of the preceding aspects and comprising the following steps:
  • a step of placing a composite material between the first and the second half-mold,
  • a step of closing the mold and stamping by bringing the two half-molds together,
  • a step of pushing the support of the at least one orifice towards the receiving and overmolding space so as to cut the composite material insert by means of the blade,
  • a step of pushing the pusher so that it comes into sealing contact with the blade and pushes said blade and the support so as to seal the receiving and overmolding space,
  • an injection step of the overmolding material, and
  • a step of opening the mold by separating the two half-molds and discharging the overmolded part.

Selon un aspect du procédé de fabrication, le support comporte un canal d'évacuation et le poussoir comporte au moins une excroissance de sorte à pousser la chute de découpe de l'insert en matériau composite à l'intérieur dudit canal d'évacuation.According to one aspect of the manufacturing method, the support comprises an evacuation channel and the pusher comprises at least one protrusion so as to pushing the cutting chute of the composite material insert into said discharge channel.

Selon un autre aspect du procédé de fabrication, entre l'étape de poussée du au moins un support vers l'espace de réception et de surmoulage et l'étape d'injection du matériau de surmoulage, ledit procédé comporte une étape supplémentaire d'écartement des deux demi-moules afin d'agrandir l'espace de réception et de surmoulage pour accueillir un volume prédéterminé de matériau de surmoulage.According to another aspect of the manufacturing method, between the step of pushing the at least one support towards the receiving and overmolding space and the step of injecting the overmolding material, said method comprises an additional step of spacing. two half-molds to enlarge the receiving space and overmoulding to accommodate a predetermined volume of overmoulding material.

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante, donnée à titre d'exemple illustratif et non limitatif, et des dessins annexés parmi lesquels :

  • les figures 1 à 5 montrent des représentations en perspectives en coupe d'un moule selon l'invention, durant différents moments du procédé de fabrication,
  • les figures 6 et 7 montrent des organigrammes montrant les étapes du procédé de fabrication selon deux modes de réalisation.
Other features and advantages of the invention will emerge more clearly on reading the following description, given by way of illustrative and nonlimiting example, and the appended drawings among which:
  • the Figures 1 to 5 show perspective representations in section of a mold according to the invention, during different moments of the manufacturing process,
  • the Figures 6 and 7 show flowcharts showing the steps of the manufacturing method according to two embodiments.

Les éléments identiques sur les différentes figures, portent les mêmes références.The identical elements in the different figures bear the same references.

Les figures 1 à 5 montrent des représentations en perspectives en coupe d'un moule 1 selon l'invention, durant différents moment du procédé de fabrication 100.The Figures 1 to 5 show perspective representations in section of a mold 1 according to the invention, during different times of the manufacturing process 100.

Le moule 1 pour estampage et surmoulage d'insert en matériau composite 3 comprend un premier et un second demi-moules 1a, 1b complémentaires l'un de l'autre et définissant un espace de réception et de surmoulage 5 de l'insert en matériau composite 3. La forme des premier et second demi-moules 1a, 1b permet la mise en forme dudit insert en matériau composite 3 par estampage. Le moule 1 comporte également un orifice d'injection 7 de matériau de surmoulage 9 par lequel le matériau de surmoulage 9, par exemple un thermoplastique, est injecté dans l'espace de réception et de surmoulage 5.The mold 1 for embossing and overmolding the insert of composite material 3 comprises a first and a second half-molds 1a, 1b complementary to each other and defining a receiving space and overmolding 5 of the insert of composite material 3. The shape of the first and second half-molds 1a, 1b allows the shaping of said insert of composite material 3 by stamping. The mold 1 also comprises an injection orifice 7 of over-molding material 9 through which the overmolding material 9, for example a thermoplastic, is injected into the receiving and overmolding space 5.

Comme montré sur les figures 1 à 5, le premier demi-moule 1a comporte au moins un orifice 20 à l'intérieur duquel est placée une lame 24 en emporte-pièce portée par l'extrémité d'un support 22 mobile de sorte à pouvoir découper l'insert en matériau composite 3 par mouvement du support 22 en direction de l'espace de réception et de surmoulage 5. La lame 24 est jointive avec la paroi de l'orifice 20 du premier demi-moule 1a. La lame 24 peut venir de matière avec le support 22 ou bien, comme présenté sur les figures 1 à 5, être un élément rapporté et démontable fixé sur le support 22, par exemple au moyen de vis 25.As shown on Figures 1 to 5 , the first half-mold 1a comprises at least one orifice 20 inside which is placed a blade 24 punched carried by the end of a support 22 movable so as to be able to cut the insert of composite material 3 by movement of the support 22 towards the receiving and overmolding space 5. The blade 24 is contiguous with the wall of the orifice 20 of the first half-mold 1a. The blade 24 can come from material with the support 22 or, as shown on the Figures 1 to 5 , being an attached and dismountable element fixed on the support 22, for example by means of screws 25.

Le second demi-moule 1b comporte un orifice 30, en regard du au moins un orifice 20 du premier demi-moule 1a, à l'intérieur duquel est placé un poussoir 32 de forme correspondante et jointif avec la paroi de l'orifice 30 du second demi-moule 1b. Le poussoir est mobile à l'intérieur de l'orifice 30 du second demi-moule 1b de sorte à pouvoir venir en contact jointif avec la lame 24. Pour cela, l'orifice 30 du second demi-moule 1b est de taille inférieure à l'orifice 20 du premier demi-moule 1a, de sorte que l'extrémité du poussoir 32 puisse entrer en contact avec la lame 24 comme montrer sur les figures 3 et 4.The second half-mold 1b comprises an orifice 30, facing the at least one orifice 20 of the first half-mold 1a, inside which is placed a pusher 32 of corresponding shape and joined to the wall of the orifice 30 of the second half-mold 1b. The pusher is movable inside the orifice 30 of the second half-mold 1b so as to be able to come into contiguous contact with the blade 24. For this, the orifice 30 of the second half-mold 1b is smaller than the orifice 20 of the first half-mold 1a, so that the end of the pusher 32 can come into contact with the blade 24 as shown on the Figures 3 and 4 .

Le second demi-moule 1b peut également comporter une plaque de découpe 34, en regard de la lame 24 de sorte à faciliter la découpe de l'insert en matériau composite 3 ainsi que de protéger le second demi-moule 1b de ladite lame. La plaque de découpe 34 peut être en acier haute dureté et être fixée au second demi-moule 1b au moyen de vis 35.The second half-mold 1b may also include a cutting plate 34, facing the blade 24 so as to facilitate the cutting of the composite material insert 3 as well as to protect the second half-mold 1b of said blade. The cutting plate 34 may be of high hardness steel and be fixed to the second half-mold 1b by means of screws 35.

Selon un mode de réalisation particulier, le support 22 peut comporter un canal d'évacuation 27 en son centre afin d'accueillir et de permettre l'évacuation de la chute de découpe 3' de l'insert en matériau composite 3. Le poussoir 32 du second demi-moule 1b peut quant à lui comporter au moins une excroissance 36 de sorte à repousser la chute de découpe 3' dans le canal d'évacuation 27 du poussoir 22.According to a particular embodiment, the support 22 may comprise a discharge channel 27 at its center to accommodate and allow the evacuation of the cutting chute 3 'of the composite material insert 3. The pusher 32 of the second half-mold 1b may in turn have at least one protrusion 36 so as to push the cutting chute 3 'into the discharge channel 27 of the pusher 22.

Le fait que le poussoir 32 soit jointif avec la paroi de l'orifice 30 et également qu'il puisse venir en contact jointif avec la lame 24 (elle-même jointive avec l'orifice 20), permet de refermer de façon étanche l'espace de réception et de surmoulage 5. L'espace de réception et de surmoulage 5 peut ainsi accueillir une injection de matériau de surmoulage 9 via l'orifice d'injection 7 qui le remplira et surmoulera l'insert en matériau composite 3.The fact that the pusher 32 is contiguous with the wall of the orifice 30 and also that it can come into contiguous contact with the blade 24 (itself joined with the orifice 20), makes it possible to close the seal tightly. reception and overmolding space 5. The reception and overmolding space 5 can thus accommodate an injection molding material 9 via the injection port 7 which will fill it and overmold the composite material insert 3.

En faisant varier le nombre d'orifices 20, 30 il est ainsi possible d'usiner directement l'insert en matériau composite 3 à l'intérieur du moule 1. La forme de la découpe effectuée par la lame 34 en emporte pièce, ainsi que la forme du poussoir 32, du support 22 et des orifices 20, 30, peut par exemple être circulaire afin de former un orifice tubulaire pour le passage d'un axe ou d'une vis de fixation dans la pièce surmoulée 3, 9 après surmoulage.By varying the number of orifices 20, 30 it is thus possible to directly machine the insert of composite material 3 inside the mold 1. The shape of the cut made by the blade 34 in punch, as well as the shape of the pusher 32, the support 22 and the orifices 20, 30 may for example be circular in order to form a tubular orifice for the passage of an axis or a fixing screw in the overmoulded part 3, 9 after overmolding .

De ce fait, le moule 1 permet, l'estampage de l'insert en matériau composite 3, la découpe de ce dernier selon un usinage désiré et le surmoulage de l'insert en matériau composite 3 de sorte à former une pièce surmoulée 3, 9 finale économique car nécessitant moins d'opérations et de machines outils pour sa fabrication.As a result, the mold 1 allows the stamping of the composite material insert 3 to cut the latter according to a desired machining and the overmoulding of the composite material insert 3 so as to form an overmoulded part 3, 9 economic final because requiring less operations and machine tools for its manufacture.

La présente invention concerne également un procédé de fabrication 100 d'une pièce surmoulée 3, 9 comportant un insert en matériau composite 3, au moyen d'un moule 1 comme décrit précédemment. Les figures 6 et 7 montrent un organigramme des différentes étapes d'un tel procédé de fabrication 100 selon deux modes de réalisation.The present invention also relates to a method of manufacturing 100 an overmoulded part 3, 9 comprising an insert made of composite material 3, with medium of a mold 1 as previously described. The Figures 6 and 7 show a flowchart of the different steps of such a manufacturing method 100 according to two embodiments.

Le procédé de fabrication comporte ainsi une étape 102 de mise en place d'un matériau composite 3 dans le moule 1, par exemple sous forme d'un feuillet, et plus précisément entre les deux demi-moules 1a, 1b. Cette étape est notamment illustrée par la figure 1.The manufacturing method thus comprises a step 102 of placing a composite material 3 in the mold 1, for example in the form of a sheet, and more precisely between the two half-molds 1a, 1b. This step is illustrated in particular by the figure 1 .

Suite à cette étape 102, est réalisée une étape 104 de fermeture du moule 1 et d'estampage par rapprochement des deux demi-moules 1a, 1b.Following this step 102, a step 104 is made to close the mold 1 and stamping by bringing the two half-molds 1a, 1b closer together.

Ensuite vient une étape 106 de poussée du support 22 dans le au moins un orifice 20 du premier demi-moule 1a vers l'espace de réception et de surmoulage 5. Cette étape 106 a pour but de découper l'insert en matériau composite 3 au moyen de la lame 24 au sein de l'espace de réception et de surmoulage 5.Then comes a step 106 of pushing the support 22 into the at least one orifice 20 of the first half-mold 1a towards the receiving and overmolding space 5. This step 106 is intended to cut the composite material insert 3 to means of the blade 24 within the receiving and overmolding space 5.

Les étapes 104 et 106 sont particulièrement illustrées par la figure 2.Steps 104 and 106 are particularly illustrated by the figure 2 .

L'étape 106 est suivie d'une étape 108 de poussée du poussoir 32 de sorte qu'il entre en contact étanche avec la lame 24 et repousse la lame 24 et le support 22 de sorte à refermer de façon étanche l'espace de réception et de surmoulage 5. Cette étape 106 est particulièrement illustrée par la figure 3.Step 106 is followed by a step 108 of pushing the pusher 32 so that it comes into sealing contact with the blade 24 and pushes the blade 24 and the support 22 so as to close the receiving space in a sealed manner. and overmoulding 5. This step 106 is particularly illustrated by the figure 3 .

Dans le mode de réalisation particulier où le support 22 comporte un canal d'évacuation 27 et où le poussoir présente au moins une excroissance 36, cette étape 108 permet également l'évacuation de la chute de découpe 3'. Cette dernière est repoussée par la au moins une excroissance 36 dans le canal d'évacuation 27.In the particular embodiment where the support 22 comprises a discharge channel 27 and where the pusher has at least one protrusion 36, this step 108 also allows the evacuation of the cutting chute 3 '. The latter is repelled by the at least one protrusion 36 in the evacuation channel 27.

Ensuite est réalisée une étape 110 d'injection du matériau de surmoulage 9 dans l'espace de réception et de surmoulage 5 au moyen de l'orifice d'injection 7. Cette étape 110 est particulièrement illustrée par la figure 4.Next, a step 110 for injecting the overmolding material 9 into the receiving and overmolding space 5 is carried out by means of the injection orifice 7. This step 110 is particularly illustrated by the figure 4 .

Entre l'étape 106 de poussée du support 22 vers l'espace de réception et de surmoulage 5 et l'étape 110 d'injection du matériau de surmoulage 9, ledit procédé peut comporter une étape supplémentaire 114 d'écartement des deux demi-moules 1a, 1b afin d'agrandir l'espace de réception et de surmoulage 5 pour accueillir un volume prédéterminé de matériau de surmoulage 9.Between the step 106 of pushing the support 22 towards the receiving and overmolding space 5 and the step 110 of injecting the overmoulding material 9, said method may comprise an additional step 114 of spacing the two half-molds. 1a, 1b to enlarge the receiving and overmolding space 5 to accommodate a predetermined volume of overmoulding material 9.

La figure 6 montre un premier mode de réalisation où l'étape supplémentaire 114 est réalisée à la suite de l'étape 106 de poussée du support 22 vers l'espace de réception et de surmoulage 5.The figure 6 shows a first embodiment where the additional step 114 is performed following the step 106 of pushing the support 22 to the receiving and overmolding space 5.

La figure 7 montre quant à elle un second mode de réalisation où l'étape supplémentaire 114 est réalisée à la suite de l'étape 108 de poussée du poussoir 32.The figure 7 shows a second embodiment where the additional step 114 is performed following the push step 108 of the pusher 32.

Enfin, est réalisée une étape 112 d'ouverture du moule 1 par séparation des deux demi-moules 1a, 1b et évacuation de la pièce surmoulée 3, 9. Cette étape 112 est particulièrement illustrée par la figure 5.Finally, a step 112 is made for opening the mold 1 by separating the two half-molds 1a, 1b and evacuating the overmoulded part 3, 9. This step 112 is particularly illustrated by the figure 5 .

Ainsi, on voit bien que le moule 1 permet trois opérations que sont l'estampage de l'insert en matériau composite 3, la découpe de ce dernier selon un usinage désiré et le surmoulage de l'insert en matériau composite 3. Cela permet ainsi d'obtenir après le procédé de fabrication 100 une pièce surmoulée 3, 9 économique car nécessitant moins d'opérations et de machines outils pour sa fabrication.Thus, it is clear that the mold 1 allows three operations that are the stamping of the composite material insert 3, the cutting of the latter according to a desired machining and overmoulding of the insert of composite material 3. This allows to obtain after the manufacturing process 100 an overmoulded part 3, 9 economic because requiring less operations and machine tools for its manufacture.

Claims (9)

  1. Mold (1) for stamping and overmolding inserts made of composite material (3), said mold (1) comprising a first and a second half-mold (1a, 1b) complementing one another and defining a space for reception and overmolding (5) of the insert made of composite material (3), characterized in that:
    - the first half-mold (1a) comprises at least one orifice (20) inside which is placed a hole punch-forming blade (24) borne by the end of a mobile support (22), so as to be able to cut the insert made of composite material (3), said blade (24) being also contiguous with the wall of the orifice (20) of the first half-mold (1a),
    - the second half-mold (1b) comprises an orifice (30), facing the at least one orifice (20) of the first half-mold (1a), inside which is placed a plunger (32) of corresponding form and contiguous with the wall of the orifice (30) of the second half-mold (1b) and mobile so as to be able to come into contiguous contact with the blade (24).
  2. Mold (1) according to the preceding claim, characterized in that, facing the blade (24), the second half-mold (1b) comprises a cutting plate (34).
  3. Mold (1) according to the preceding claim, characterized in that the cutting plate (34) is made of very hard steel.
  4. Mold (1) according to one of the preceding claims, characterized in that the blade (24) is an attached and removable element fixed onto the support (22).
  5. Mold (1) according to one of the preceding claims, characterized in that the support (22) comprises a discharge channel (27) and that the plunger (32) comprises at least one protuberance (36) so as to push the cutting scrap (3') from the insert made of composite material (3) inside said discharge channel (27).
  6. Mold (1) according to one of the preceding claims, characterized in that the orifices (20; 30), the support (22), the plunger (32) and the blade (24) have a circular form.
  7. Method for manufacturing (100) an overmolded part (3, 9), comprising an insert made of composite material (3), by means of a mold (1) according to one of Claims 1 to 6, characterized in that it comprises the following steps:
    - a step (102) of placement of a composite material (3) between the first (1a) and the second (1b) half-mold,
    - a step (104) of closure of the mold (1) and of stamping by bringing the two half-molds (1a, 1b) together,
    - a step (106) of thrusting of the support (22) of the at least one orifice (20) toward the reception and overmolding space (5) so as to cut the insert made of composite material (3) by means of the blade (24),
    - a step (108) of thrusting of the plunger (32) so that it enters into tight contact with the blade (24) and pushes back said blade (24) and the support (22) so as to tightly enclose the reception and overmolding space (5),
    - a step (110) of injection of the overmolding material (9), and
    - a step (112) of opening of the mold (1) by separation of the two half-molds (1a, 1b) and of discharging of the overmolded part (3, 9).
  8. Manufacturing method (100) according to the preceding claim, characterized in that the support (22) comprises a discharge channel (27) and that the plunger (32) comprises at least one protuberance (36) so as to push the cutting scrap (3') from the insert made of composite material (3) inside said discharge channel (27).
  9. Manufacturing method (100) according to the preceding claim, characterized in that, between the step (106) of thrusting of the at least one support (22) toward the reception and overmolding space (5) and the step (110) of injection of the overmolding material (9), said method comprises an additional step (114) of spacing apart of the two half-molds (1a, 1b) in order to enlarge the reception and overmolding space (5) to accommodate a predetermined volume of overmolding material (9).
EP13780348.2A 2012-10-26 2013-10-22 Mould for stamping and overmoulding a composite material insert and associated method for producing an overmoulded component Active EP2911840B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1260265A FR2997340B1 (en) 2012-10-26 2012-10-26 MOLD FOR STAMPING AND INSERT OVERMOLDING IN COMPOSITE MATERIAL AND METHOD FOR MANUFACTURING ASSOCIATED OVERMOLDED PIECE.
PCT/EP2013/072033 WO2014064082A1 (en) 2012-10-26 2013-10-22 Mould for stamping and overmoulding a composite material insert and associated method for producing an overmoulded component

Publications (2)

Publication Number Publication Date
EP2911840A1 EP2911840A1 (en) 2015-09-02
EP2911840B1 true EP2911840B1 (en) 2017-04-26

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EP13780348.2A Active EP2911840B1 (en) 2012-10-26 2013-10-22 Mould for stamping and overmoulding a composite material insert and associated method for producing an overmoulded component

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US (1) US20150258739A1 (en)
EP (1) EP2911840B1 (en)
FR (1) FR2997340B1 (en)
WO (1) WO2014064082A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3047685B1 (en) * 2016-02-11 2018-03-16 Institut De Recherche Technologique Jules Verne DEVICE FOR MANUFACTURING, BY INJECTION MOLDING, A PIECE COMPRISING AN INSERT
KR102299492B1 (en) * 2017-03-20 2021-09-08 현대자동차주식회사 Cut working apparatus

Family Cites Families (5)

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Publication number Priority date Publication date Assignee Title
US3650655A (en) * 1969-12-10 1972-03-21 Ioannis A Santouris Apparatus for forming and stacking container lids
US3755522A (en) * 1971-10-01 1973-08-28 Monsanto Co Trim in place differential pressure thermoforming process
DE3030537A1 (en) * 1980-08-13 1982-03-25 Zehma Spezial-Stanz- und Schnittwerkzeug GmbH, 6903 Neckargemünd Hollow workpiece esp. automobile component is coated with foil - by deep drawing in mould with fixed and sliding components
JPS61125834A (en) * 1984-11-26 1986-06-13 Kasai Kogyo Co Ltd End treating construction of skin material in adhered molded product
JPH03505554A (en) * 1989-04-17 1991-12-05 ジェトラ　エンジニアリング　ピーティーワイ　リミテッド Cutting and trimming plastic pots

Non-Patent Citations (1)

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Title
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Publication number Publication date
FR2997340B1 (en) 2014-12-26
EP2911840A1 (en) 2015-09-02
WO2014064082A1 (en) 2014-05-01
US20150258739A1 (en) 2015-09-17
FR2997340A1 (en) 2014-05-02

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